Philips combi tuning - help needed please

[5linky]

--------------------------------------------------------------------------------
Hi guys,
When I switch the tv on I get a blue screen. When I select auto-installation it scans through the whole way without picking up any channels and remains blue throughout. I have tested the aerial on another tv and it works fine.
Something aint right
Any suggestions??

cheers

steven

ps ive got 'N ACT' on my menu, so i will get rid of that 1st and see if that helps.

[gary]

model??

[Guest]

Its a 14PV200 Combi. Ive got rid of the 'N ACT' and restored it to factory settings but it still shows a blue screen.

[gary]

i cant remember if the unit uses a pll tuner or a varicap tuner, check supplies to tuner, if tuner has scl & sda lines check 33v rail is correct, if it does not have sda check vt rail varies between low volts and 33v during tuning, if correct probable duff tuner.